The band revealed that they have been working on making the mini-festival a reality for some time.

"A More Perfect Union is something we have been excited about doing for a while now," they said.

"Bringing a festival to Australia that we can grow into something incredible for people. This is the first of hopefully many, and we have asked some friends we really respect to join us.

Gang of Youths announced the festival just months before their Aussie tour. Picture: Jonathan Ng

"We are constantly surprised by, and are very grateful for the way Australia has treated us and we hope people in Brisbane can come along and enjoy the show."

Tickets for A More Perfect Union are $99 and can be purchased via the Gang Of Youths website.

The band has also partnered with arts and cultural fundraising organisation. This means a dollar from every ticket sold go to support the Aboriginal Legal Service and its work providing culturally appropriate legal services, influencing positive change, and increasing access to justice for Aboriginal and Torres Strait Islander People.